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Safety evaluation of multilane arterials in Florida
Mohamed Abdel-Aty1, Prem Chand Devarasetty, Anurag Pande
1Department of Civil, Environmental & Construction Engineering, University of Central Florida, Orlando, FL 32816-2450, USA. mabdel@mail.ucf.edu
Accident; Analysis and Prevention
|June 23, 2009
Summary
Highway resurfacing projects can significantly improve safety, especially when combined with additional improvements like adding turning lanes or paving shoulders. These enhancements reduce overall crashes, particularly severe and rear-end collisions on multilane arterials.
Area of Science:
- Transportation Engineering
- Road Safety Analysis
- Highway Construction
Background:
- Resurfacing is a common highway construction activity aimed at improving riding quality.
- The safety impact of resurfacing on multilane arterials with partial access is not well understood.
- Assessing safety effects requires rigorous before-after evaluation methods.
Purpose of the Study:
- To examine the safety effects of highway resurfacing projects on multilane arterials.
- To evaluate the impact of resurfacing on all crashes, rear-end crashes, and severe crashes.
- To identify additional improvements that enhance safety during resurfacing.
Main Methods:
- Utilized the Empirical Bayes method for before-after safety evaluations.
- Employed negative binomial regression models for Safety Performance Functions (SPFs).
- Segregated SPFs by crash types, segment length, and land use (urban, suburban, rural).
Main Results:
- Safety effects of resurfacing vary widely across different projects and conditions.
- Additional improvements, excluding sidewalk enhancements for total crashes, consistently improved safety.
- Adding turning lanes and paving shoulders were associated with reductions in rear-end crashes.
Conclusions:
- Highway resurfacing projects can lead to significant safety improvements.
- Integrating cost-effective additional improvements with resurfacing is recommended.
- Specific improvements like turning lanes and paved shoulders are effective in reducing rear-end collisions.
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